Multi-fuel switching device

Abstract

A multi-fuel switching device, including a gas part, is provided. The gas part includes a switching valve. The switching valve includes a housing having an air inlet and an air outlet. An internal rotation of the housing is provided with a valve core located between the air inlet and the air outlet. The valve core is provided with a first airway and a second airway. Cross-sectional sizes of the first airway and the second airway are different. The first airway or the second airway is selected through rotating the valve core to connect the air inlet and the air outlet. The solution solves the issue that a fuel switching device in the prior art cannot adapt to three or more fuels, which causes an internal combustion engine to be unable to maintain the optimal working state.

What is claimed is: 
     
       1. A multi-fuel switching device, comprising a gas part, wherein the gas part comprises a switching valve, the switching valve comprises a housing having an air inlet and an air outlet, a valve core is rotatably set within the housing and located between the air inlet and the air outlet, the valve core is provided with a first airway and a second airway, cross-sectional sizes of the first airway and the second airway are different, and the first airway or the second airway is selected through rotating the valve core to connect the air inlet and the air outlet. 
     
     
       2. The multi-fuel switching device according to  claim 1 , wherein the valve core is provided with an inlet opposite to the air inlet, the inlet extends along a direction of a rotating shaft of the valve core, and the first airway and the second airway are both connected to the inlet. 
     
     
       3. The multi-fuel switching device according to  claim 2 , wherein a contour of a region of the valve core between an end of the first airway away from the inlet and an end of the second airway away from the inlet is greater than a contour of the air outlet. 
     
     
       4. The multi-fuel switching device according to  claim 1 , wherein the housing is rotatably connected to a rotating shaft, the rotating shaft is statically connected to the valve core, and the rotating shaft is statically connected to a position feedback device. 
     
     
       5. The multi-fuel switching device according to  claim 4 , wherein the position feedback device comprises a spinning part, the spinning part is provided with an elastic abutting part, and the housing is statically connected with an alignment part cooperating with the elastic abutting part. 
     
     
       6. The multi-fuel switching device according to  claim 5 , wherein the alignment part has a groove shape, and the elastic abutting part comprises a steel ball slidably cooperating with the spinning part and a spring driving the steel ball. 
     
     
       7. The multi-fuel switching device according to  claim 1 , further comprising a liquid fuel switch, wherein the liquid fuel switch is linked with the valve core. 
     
     
       8. The multi-fuel switching device according to  claim 7 , wherein the liquid fuel switch has a feeding nozzle and a discharging nozzle, the liquid fuel switch further comprises a rotating part linked with a rotating shaft, the rotating part is located between the feeding nozzle and the discharging nozzle, and the rotating part is provided with a fuel channel that implements connection between the feeding nozzle and the discharging nozzle through rotating the rotating part. 
     
     
       9. The multi-fuel switching device according to  claim 8 , further comprising a solenoid valve and a solenoid valve switch that control connection and disconnection of a main jet of a carburetor, and a protruding part linked with the rotating shaft and in contact with the solenoid valve switch. 
     
     
       10. The multi-fuel switching device according to  claim 9 , further comprising a flameout switch located on a side of the rotating shaft and a flameout boss linked with the rotating shaft and used to trigger the flameout switch. 
     
     
       11. The multi-fuel switching device according to  claim 1 , wherein the housing is connected to an ignition angle control switch, the multi-fuel switching device further comprising a bump linked with the valve core and cooperating with the ignition angle control switch.